libxl: bail from placement on non-NUMA boxes

If there only is 1 NUMA node, no need to go through placement
candidate selection, etc., we can just bail.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/libxl/libxl_numa.c b/tools/libxl/libxl_numa.c
index 4fac6641c68cbe38e41076f830c908ee32184a23..94ca4fec46be08e97cc67960f5dabb4b82770d19 100644 (file)
--- a/tools/libxl/libxl_numa.c
+++ b/tools/libxl/libxl_numa.c
@@ -308,6 +308,11 @@ int libxl__get_numa_candidate(libxl__gc *gc,
     if (ninfo == NULL)
         return ERROR_FAIL;
 
+    if (nr_nodes <= 1) {
+        *cndt_found = 0;
+        goto out;
+    }
+
     GCNEW_ARRAY(vcpus_on_node, nr_nodes);
 
     /*